Answer: 
Step-by-step explanation:
 You need to use the following formula:
  
 Given the points A(6,3) and B(8,1), you can identify that:
 
 Now, you can substitute these values into the formula  .
.
 Therefore, you get this result:
 
 
 
        
                    
             
        
        
        
Answer:
186 beats per minute
Step-by-step explanation:
The maximum heart rate (r ) in beats per minute is modeled by the equation :
r = 220 - a ...(1)
Where
a is age of the person in years
If Sanchez age is, a = 34 years
Put a = 34 in equation (1)
r = 220 - 34
= 186 beats per minute
Hence, the maximum heart rate is 186 beats per minute.
 
        
             
        
        
        
There is nothing there to work with